A Youtube video just released by Tunze provides a detailed explanation of the function and importance of efficient flow in aquaria.

Furthermore, the video, which appears to be a response to the conclusions drawn in a recent study of stream pump flow rates published on the Advanced Aquarist blog site, goes on to show a number of tests which appear to indicate that Tunze designed pumps balance this quality of flow differently to a number of unspecified competitor units.

Take a look at the video and draw your own conclusions!